What are Combination Bands?

Jul 6, 2026 | Glossary of Spectroscopy Terms, StellarNet Definition

Combination bands occur when two or more molecular vibrations are excited simultaneously, producing absorption features at unique wavelengths within the near-infrared region. Together with overtone bands, combination bands provide much of the chemical information used...

What are Overtones?

Jul 6, 2026 | Glossary of Spectroscopy Terms, StellarNet Definition

Overtones are higher-order molecular vibrations that occur at multiples of a fundamental vibrational frequency. In near-infrared (NIR) spectroscopy, overtone absorptions are much weaker than the corresponding fundamental absorptions observed in the mid-infrared...

What is Chemometrics?

Jul 6, 2026 | Glossary of Spectroscopy Terms, StellarNet Definition

Chemometrics is the application of statistical, mathematical, and machine learning techniques to spectral data in order to identify materials, quantify chemical constituents, and predict sample properties. By analyzing subtle spectral patterns, chemometric models...

What is Spectroscopy?

Sep 23, 2025 | Glossary of Spectroscopy Terms, Spectroscopy

Spectroscopy is the study of how matter interacts with electromagnetic radiation. By analyzing the absorption, emission, or scattering of light across various wavelengths, spectroscopy reveals detailed information about the composition, structure, and properties of...

Visual Quality, Motility Behavior, and Retinal Changes Associated with Reading Tasks Performed on Electronic Devices

Sep 11, 2023 | Application, Electronics

Elvira Orduna-Hospital, María Munarriz-Escribano, Ana Sanchez-Cano August 20, 2023 | Department of Applied Physics, University of Zaragoza, 50009 Zaragoza, Spain Back to school marks a fresh start for reading and learning! Electronic devices have become a common...

Sensitive Detection of the Human Epididymis Protein-4 (HE4) Ovarian Cancer Biomarker through a Sandwich-Type Immunoassay Method with Laser-Induced Breakdown Spectroscopy

Apr 20, 2023 | Application, Biology, Chemistry, Lasers

Robinson Karunanithy, Suthakaran Ratnasingam, Torrey Holland, and Poopalasingam Sivakumar Bioconjugate Chem. 2023, 34, 3, 501–509 Abstract Detection of cancer before the appearance of any symptoms is crucial for successful treatment. Early detection is, however, very...